12112111123 has 4 divisors (see below), whose sum is σ = 13842412720. Its totient is φ = 10381809528.

The previous prime is 12112110943. The next prime is 12112111133. The reversal of 12112111123 is 32111121121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12112111123 - 2⁹ = 12112110611 is a prime.

It is a super-2 number, since 2×12112111123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12112111097 and 12112111106.

It is not an unprimeable number, because it can be changed into a prime (12112111133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865150788 + ... + 865150801.

It is an arithmetic number, because the mean of its divisors is an integer number (3460603180).

Almost surely, 2^12112111123 is an apocalyptic number.

12112111123 is a deficient number, since it is larger than the sum of its proper divisors (1730301597).

12112111123 is an equidigital number, since it uses as much as digits as its factorization.

12112111123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730301596.

The product of its digits is 24, while the sum is 16.

Adding to 12112111123 its reverse (32111121121), we get a palindrome (44223232244).

The spelling of 12112111123 in words is "twelve billion, one hundred twelve million, one hundred eleven thousand, one hundred twenty-three".